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Finding the Fourth Proportional to 581.34, 802.49 and 385.12

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Solution

The fourth proportional to 581.34, 802.49 and 385.12 is: 531.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.34 : 802.49 = 385.12 : x
  2. Step 2: Convert to fraction form
    581.34/802.49 = 385.12/x
  3. Step 3: Cross multiply
    581.34x = 802.49 × 385.12
  4. Step 4: Simplify right side
    581.34x = 309,050.94
  5. Step 5: Solve for x
    x = 309,050.94/581.34
  6. Step 6: Final answer
    x = 531.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.